TX-125 Specifications
| Spark plug | NGK BP5ES |
| Spark plug gap | 25 thousandths |
| Voltage to coils | 18-24 volts |
| Voltage in battery while running | 13.5-14.5 volts |
| Transmission oil | 20W-50 or 15W-40 |
| 2 cycle oil to gas | 4 to 4.5 oz. per gal. |
| Timing | 20 degrees or .073 inches before TDC |
| Point gap | 16 thousandths |